preproc.c: simplify %un[i]macro warning message
preproc.c: simplify %un[i]macro warning message

projedi/nasm,techkey/nasm,projedi/nasm,letolabs/nasm,Distrotech/nasm,turingstudio/nasm,projedi/nasm,techkey/nasm,turingstudio/nasm,projedi/nasm,letolabs/nasm,techkey/nasm,letolabs/nasm,turingstudio/nasm,Distrotech/nasm,Distrotech/nasm,turingstudio/nasm,techkey/nasm,techkey/nasm,Distrotech/nasm,projedi/nasm